Machine powered chuck



NOV- 20, 1951 G. A. HIGHBERG MACHINE POWERED CHUCK 2 SIIEETS-SI'iEET l Filed NOV. 19, 1949 ruzru fil H T'TORN' K Nov. 20, 1951 G. A. HIGHBERG i 2,575,562

MACHINE POWERED CHUCK Filed NOV. 19, 1949 n 2 SHEETS-SHEET 2 mm` 1mm .l

. u INVENTCIC` 650km? #fav/BERG #Tram/5'):

Patented Nov. 20, 1951 MACHINE POWERED CHUCK George'A.V Highberg, West Hartford, Conn., as-

signor to The Whiton London, Conn.

Machine Company, vNew Application November 19,1949; sei-iai No. 128,444

- This invention relates to a machine powered chuck and more particularly to chucks such as yare operated by power from the machine in which they are mounted, for opening and closing the jaws of Said chucks during the rotation thereof.

It is an object of this invention to provide such` a chuck of a novel and improved construction which is easy to operate, highly efficient and durable. Y

Further objects and advantages of this invention will be more clearly understood from the following description and from the accompanymechanism.

Fig. 5 is a front view thereof, partly in section.

Fig. 6 is a fragmentary plan view showing one of the operating members partly in section.

Fig. 7 is a front view of said mechanism showing one of the levers in a different position.

In the embodiment illustrated in the drawings, the numeral 5 denotes the rotatable hollow Spindle of a machine, such as a lathe-or other type of turning machine, in which the work-is held therein by means of a chuck.

My improved chuck comprises a body having a face portion 6 with a hub 1 that is secured to the spindle 5 by means of screws 8. A plurality of work engaging jaws 9 are slidably mounted in the face portion of the chuck and moved relatively to each other to opened and closed positions by means of a scroll plate I which is rotatable on the hub 1. I Y

The said scroll plate has an operating fiange yI I which iS secured thereto by means of screws I2 and is disposed rearwardly of the chuck body. A series of gear teeth I3 are provided along the periphery of the scroll plate and mesh with the teeth of one or more rotating pinions I4 each having a shank I5 which is rotatable in said body and has a Squared end I6 projecting therefrom so as to receive a suitable wrench when it is desired to manually rotate said pinions.

A bearing ring I1 is Secured to the rear of the body, by means of screws I8, to rotatably support the opposite ends of the Shanks I5. An annular groove I9 is provided in the periphery ofthe chuck to receive a ring gear 20 having internal teeth 2| which extend inwardly between the face 7 claims. (012799114) t 2 portion 6 and thebearing ring I1 and mesh with the teeth of the scroll rotating pinions I4.

The flange -I I and the ring 20 are each provided with a radiallyextending lug 22 and 23, respectively, which engage lugs 24 and 25, respectively, en op'erating levers 26 and 21 that are pivotally mounted, as at 28, on a bracket 29 which is Secured to a suitable stationary portion of the machine such as indicated at 30. Springs 3| and 32 are provided for the levers 26 and 21, respectively, to yieldingly retain the said operating levers in their normal inoperative position against a suitable stop'33.

- In-order to stop the chuck jaws in their opening movement and thereby prevent the said jaws from becoming disengaged from the scroll plate IIJ, I provide a stopV plate 34 which is secured by screws 35, to the face of the chuck to thereby engage an abutment, such as the wall 36 on one of the jaws and prevent further opening movement of the jaws towards the open position.

The operation of my improved chuck is as follows:

When it is desired to close the jaws 9 during therrotation Yof the chuck by the machine, the lever 21 is forcedV downwardly to the position indicated in dotted lines in Fig. 2. This causes engagement between the lug 25 on Said lever and the lug 23 on the ring gear 20 to thereby stop vthe rotation of the said ring gear and cause rotation of the pinions I4. The said pinions then rotate the scroll plate II) and Slide the jaws 9 inwardly into closed position on the face 6.

When it is desired to open Said jaws, the lever 26 iS pressed downwardly,Y causing engagement between the lugs 24 and 22. This will stop the rotation of the flange II'and the scroll plate I0 and, Athrough the rotation of the chuck body therebymove the jaws outwardly into open position.

When Vit is desired toV manually operate the jaws, either into open or closed position, the scroll plate I0 may be rotated by applying a wrench to the squareend I6 and rotating one of the operating pinions. Y

VIt will be noted thatthe lugs 22 to 25 have tapered sides so as to prevent positive locking action between the lugs on the levers and those onthe chuck which could cause possible damage to the operating levers 26 and 21 in cases where excessive power is used in rotating the chuck. These tapered sides will permit the lugs to. become disengaged immediately upon the levers being released, or upon the jaws reaching a fully open or closed position.` and thereby prevent inthe chuck will also be forced to rotate .and thereby cause similar disengagement of the 'lugs 23'and illustrated in Figs. 4 to '7, I provide a mounting block 3l which is preferably, secured to, V,the

spindle housing of the machine, indicated at`"a'8,v 4

by means of the bolts 39. This block ,isprovided with a pair of recesses 4A which open downwardly andfnnntain plnngers 4lland142 rra.Spentivgly...that

are Slidabln naid reessesand ornedrnawn- .Wardlv by. n1eans.of springs43 into engagement .vwith Y,the lugs l 22, and v2 3 -on the,,chuck. l,The plungers ,4l and ,42 v.each havea lshank which .pimienta `uwardly; through` a klaaflllcni Opening in .tnablnckl and. .carries supports .24.4 .and 4.5 ,t .which lare secured Aoperating levers 46 and v4l.

These levers are eachprovidedV with cam portions l .4,8 Whnneneaee thns-top'nfine block 31 .and force the respectiva. plnnaenunwardly against .thailan- V sion of Vthegspring 4,3, when the lever is pulled downwardly tothe position illustrated v,in Flg..5, andthersby dsengaeesthe plunger from its respective lug on thechuck.

Wtnths .rnndied form .of operating mechanism,` when it is desiredf to open or close, the jaws of the chuck, the prqperoperating lever ismerely thrown upwardlyut'gi. release Lits respectiyeplunger Y and permit it t0. movadownlrardly, under tension Of its Snrinal, ,into engagement with-theme `on Ythe chuck. VVWhfenthe chuck-, is-,forced into` rotation, through neglect of the operator, the said plunger will merely be forced upwardly-against the tension of the springgand will 'overpassithe lug on the chuck, as -shownin ,Fig. 7,.without causing damage.

1- A Chunk Comprising a haar. a plurality ,of .iaWS Y.mnwalnlf Qn saidhody. a scroll plate for moving said jaws to open `and closedpositions, a flange secured tosaid scroll plate ,and having an abutment portion ,-,thereom and ,a stationary abutment engageable with said V abutment vonV the flange during rotation of the chuckv to stop the rotation of the scroll` plate with thechuck and cause movement of the jaws. i

2. A chuck as set forth inclaim 1, wherein the engaging surfaces Qfsaid abutments are angled to provide cam portions for causing disengagement of said abutments upon excessive force being appliedvtherebetween to thereby permit rotation of the chuck when a predetermined-limit of movement of saidchuck relatively to the abutments thereon has been reached.

3.- AA chuck comprisinga body,a plurality of `jaws moveable on said body, a hub on said body, a scroll plate rotatable on said hub and engageable with 'saidjaws for moving them into open and closed positions upon rotation of the plate relatively to the body, a pinion rotatable in said `body inY engagement with teeth on said scroll In the modified form of .operatinglmechanism said scroll plate, a lug projecting from said flange, a lever pivotally mounted independently of said chuck and having a lug thereon adapted to engage the lug on the said ring gear, and a separate lever similarly mounted and having a lug adapted to engage the lug on the flange; the said levers being separately operable during the rotation of j the chuck vto stop theprotationof the said ring gear with. the chuck and thereby provide rotation of the scroll plate relatively to the body to move the jaws to one of said positions, or to stop rotation ofthe flange to thereby stop the rotation 'ofthe scroll plate with the chuck body and there- ,by'-proyide relative rotation therebetween for movingthe jawsto the other of said positions.

llainichuckcomprising a body, a plurality of ,.,lawslradially movable on said body, a scroll plate rotatable for moving said jaws to open and closed `positions, means including an abutment normally rotatable with said chuck, mechanism op- .srablaunanztna rclativaof l said. .abut- Giannina Cnnkrfnlzna 'ne rotation .ofrsaid rallrlataa n1ninallyA rncvable nXed .abutment ,amiable tof-.enaaaasaid first abutment, andarevent` rotation thereof with the v4chuck to cause @fallin fallnlatafandnieanann Said Chuck `nroof'said jaws; the said abutments having angled @Operating surfaces to anse ,disengagement 0f Saidfabannents bytnerntainn @fine ,nnnknpon l @table in. .Sad ,9dr and kannaenanlel .with said gear teeth, a ring gear rotatable' onwsaidabody andtharneteeth nneaeeablnlwitn the teeth 0f vvSaidl nien v.alnannfSaidIcing scar, nxed abutmant Ingllarngmrinlnlding ,a-pair naleven piv- OtalYnlQanten independently@ Vthe chunk .and

0n a.;.statinnarvrnrnnn .aanname-chine@ Aseparata abutment operable by .cachot said-levers; .'Qne ,cfithe Said @levers heine. ,separately operable xnrrnsfntation Qfy tl1echl1ck ct0...cause engage- '.mgntlofrts respectiva ahutmentwithfthe lug on the scroll piantato-thereby stopfthescroll plate andnanse:.lnoyementnitherjawsin one direction, and ille; Qllherrf. Said Byers being yseparately operabletoause engagement of its respective abutment withjhe. lug on; the Aring v,star to. therethy; 15h01) lirritation :of f the ringgear. and, ythrough the,saidpinionrcause theesaid scroll platefto `rotategfaster thanthesaid;chuck;body, to, thereby cause movement of the jaws .intthe opposite direction.

- 6.1A :chucklasfset forthin claim 5 wherein'the .iixed ,abutment mechanism -includes vla, block 1 adaptedxtoebe mounted Vto a ,stationary `portion of the. lmachine yand havingY a vpair of. downwardly open -recesses therein, a. plunger .slidable in leach oflsaidlrecesses, ai stem on, each of said plungers extending upwardly through the wall of the Vrecess Kto, afposition above thetop-of theblock, al lever pivotally mounted togeach of saidv stems,V spring means ier ,urging saldznlnngers downwardly in tnegblonk, and means Yaan.elated with each of 4saidlevers for retaining the plungers in the block .against the ,tension c of-l said spring means; the

saidgleversfbeing separatelypperable .to ,move its resneciivnnlnnae- .dwnvardn-:mto engagement with the abutments on the scroll plate or ring gear.

7. A chuck as set forth in claim 5 wherein the rst abutment means includes a block adapted to be mounted to the stationary portion of the machine, a pair of plungers slidable in said block; one of said plungers being in register With the lug on the scroll plate and -the other of said plungers being in register with the lug on the ring gear, spring means for urging each of said plungers projecting upwardly through the block to a position above the top thereof, a supporting member fastened to each of said Stems, a lever pivotally mounted to each of said supporting members, and cam means on said levers engageable with the top of the block for retaining the plungers in retracted position; the said levers being separately operable to move its respective plunger downwardly into engagement with its respective lug.

GEORGE A. HIGHBERG.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,473,464 Church Nov. 6, 1923 1,608,462 Cutler Nov.'23, 1926 1,608,463 Cutler Nov. 23, 1926 1,608,464 Cutler Nov. 23, 1926 1,713,799 Wheaton May 21, 1929 1,807,385 Church May 26, 1931 

